Comment 31 for bug 1731351

Reviewed: https://review.opencontrail.org/37853
Committed: http://github.com/Juniper/contrail-controller/commit/052c02c2b8dfdde99e6adb08a70ff3a7ca8743d0
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit 052c02c2b8dfdde99e6adb08a70ff3a7ca8743d0
Author: Nischal Sheth <email address hidden>
Date: Sun Nov 19 21:19:33 2017 -0800

Wrap up EVPN aliasing implementation

o Use per-ESI AD route peer and attributes to add aliased paths instead
of using the MAC route BgpPath peer and attributes. This will make it
easier to figure out which AD routes triggered the addition of aliased
paths.
o Remove route targets when importing AD routes into VRF. This ensures
that the aliased paths do not have a large number of route targets.
Note that we expect per ESI AD routes to have a large number of route
targets.
o Simplify EvpnSegment::RemotePe constructor and usage
o Make bgp_evpn_aliasing_test more robust by disabling/enabling various
TaskTriggers from the bgp:Config task instead of the main thread.

Change-Id: Ic019bda64f79c9dd52415f74d2b9fc856c26e431
Closes-Bug: 1731351